OFFICIAL MAF flow rate lb/min flow rate thread!

GSLSE20B said:

Adjustments , I just did a new one . Throttle response is leaning toward violence . Max advance is rapid and airflow is up to 52 at 7500 . .99-1.0 corrections . I'm excited to track it

Click to expand...

So your adjusting the tune Lund did by yourself, I thought their tunes were locked down?

Lund is making the adjustments. I need to get them to make some for me too, and a race tune with more timing.

Gibbo205 said:

So your adjusting the tune Lund did by yourself, I thought their tunes were locked down?

Click to expand...

They sent me an update

GSLSE20B said:

They sent me an update

Click to expand...

Ah cool, they had me do several datalogs and they made several adjustments before they were happy.

Once I get the GT 350 IM and TB they should know all the tweaks after all the work they have done with you.

That's funny. I sent one datalog after getting my flex tune and they made one adjustment, then said it looked good. Comparing VCT to a stock mani tune, it looked very similar. Hopefully someone else will look at my log this time.

dubster99 said:

That's funny. I sent one datalog after getting my flex tune and they made one adjustment, then said it looked good. Comparing VCT to a stock mani tune, it looked very similar. Hopefully someone else will look at my log this time.

Click to expand...

Who did your tune at Lund? Dakota did mine and he made a few revisions getting a bit more out the car timing wise and making fuelling adjustments before he was satisfied.

Greg. I've been talking with Jon II lately.

First decent air here in forever 64* ambient 70* iats 48.7lbs/min through the stock intake manifold with Total fuel trims +2% so 49.6lbs/min actual. I think I've pretty much maxed out the stock intake manifold on my setup at this point.

Last log I sent to lund for my revision, late at night.

51.57 lb/min at 7768rpm, 1.055 STFT, ambient temp 55deg, intake temp 57deg, adding over 3 deg of timing at that point.

44.09 @ 6706RPM

K&N Filter
Pypes Touring Mufflers
Palm Beach Dyno Tune / 93 Octane

44.3(.977)/.89= 48.6

Stock intake/TB K&N , Gt350 Manifold, Lund FF, stock manifolds, resonator flex/ flex pipe delete. summer is still here in AZ :/

RomanB said:

44.3(.977)/.89= 48.6

Stock intake/TB K&N , Gt350 Manifold, Lund FF, stock manifolds, resonator flex/ flex pipe delete. summer is still here in AZ :/

Click to expand...

Do you have dyno #'s on that combo?

BMR Tech said:

Do you have dyno #'s on that combo?

Click to expand...

Kelly I do not, but with the stock intake it pulls harder and drivability is perfect. Drivability with the Injen sucked. My wife actually turned around and dropped the car off at home because it was to jumpy for her. Won't be able to get back to the track for a couple weeks, but will update. I suspect trap speeds will be around 116-117 on slicks. Car needs headers but will have to wait till next year. Car makes peak power at around 7400 and doesn't drop off too the rev limiter. With the Injen it didn't feel like I was making any more power then the stock manifold, just get like th power band was extended.

Going to update this. I've got the CJ manifold on and in 70* humid Florida night air I'm seeing 52.6lbs/min max MAF with a +3.0% fuel trim. Corrected for trims its 54.1lbs/min. I'm seeing 8lbs/min over the stock manifold in the same conditions. This is a screenshot of part of the log. First gear 8150 RPMs. Highest MAF I logged was the top of second gear at 8100. This one still corrects to around 54lbs/min. These cars only move around 42lbs/min corrected under the same conditions I've confirmed this with my wife's car and other logs I've seen.

Interesting. nice numbers. Seems to indicate you were letting off the pedal after half way through the pull but throttle angle didn't change. MPH chop seems like a traction issue. Hopefully its not a slipping clutch.

FYI:
You can open your start menu and just type "snip" and use the snipping tool to take a pic of a selected part of your screen. It gives better quality than snapping a pic with a potato. LOL